Gathering unit for road paving machines



May 15, 1934.

H. H. BARBER ,958,460

GATHERING UNIT FOR ROAD PAVING MACHINES Filed Aug. 20, v1932 3 Sheets-Sheet l May 15, 1934. H. H. BARBER GATHERING UNIT FOR ROAD PAVING MACHINES 3 Sheets-Sheet 2 Fi led Aug. 20, 1952 May 15, 1934.

H. H BARBER GATHERING UNIT FOR ROAD PAVING MACHINES s sheets-sheet 3 Filed Aug. 20, 1932 Patented May 15, 1934 UNITED STATES PATENT OFFICE Harry B. Barber, Aurora, 111., assignor to Barber- Greene Company, Aurora, 111., a corporation of Illinois Application August 20. 1932. serial 6 Claims.

This invention relates to a gathering unit for a road paving machine and concerns itself more particularly with the scraper that travels rearwardly of the gathering spiral.

One of the objects of this invention resides in the feature of making the end portions of the scraper automatically adjustable so that the same may conform to the crown of the road.

The invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the appended claims. In the accompanying drawings, which illustrate a preferred form of this invention and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a side elevational view of a road building machine including a gathering unit comprising this invention.

Figure 2 is an enlarged sectional view taken upon the line II-II of Figure 1 looking in the direction of the arrows.

Figure 3 is an enlarged sectional view taken upon the line IIIIII of Figure 1 looking in the direction of the arrows.

Figure 4 is an enlarged sectional view taken upon the line IV-IV of Figure 2, looking in the direction of the arrows.

30 Figure 5 is an enlarged broken sectional view taken upon the line V-V of Figure 4, looking in the direction of the arrows.

Figure 6 is a fragmentary part sectional and part plan view illustrating a modified feature of the invention.

The present invention is incorporated in a loading machine that is adapted to travel over= a, roadway and pick up the material that is usu ally deposited in a windrow for elevating the same and bringing it to a suitable mixing chamber where it is mixed with certain bituminous material and redeposited upon the roadway to be acted upon by a second or trailing unit. This machine consists of a. pair of crawlers 1 which support a suitable frame'upon which a boom 2 is pivotally mounted. The boom 2 carries an endless sprocket chain 3 as is well known in the art. lhis sprocket chain passes over a shaft 3 which is equipped with spiral feeding elements 4 upon each side of the bucket line for gathering the material inwardly toward the bucket line. Directly behind the spiral feeding element, there is a. scraper 5 which is made of three sections, the outer sections 5 of which are pivotally mounted 55 ,with respect, to the central section 5 so that the same may automatically adjust themselves a pair of converging arms 8 which also assist in pivotally supporting the scraper. The forward ends of the arms 6 and 7 are pivoted between pairs of angle members 10. The outermost angle members 10 are secured to pivotal plates 11, while the two pairs of interior angle members 10 are secured to filler plates 12 in aligmnent with the plates 11. Triangular plates 13 are attached to the plates 12 upon the front side thereof as shown in Figures 3 and 4, for a purpose that will later appear.

The. central portion 5 of the scraper is sup ported by a pair of shoes 14 which are best shown in Figures 3 and 4. Each shoe 14 consists of a flat portion adapted for traveling upon the ground and which has upwardly converging side walls. As shown more clearly in Figures 4 and 5, the shoes 14 are connected together by an interior angle member 15 and exterior angle members 16 between which the converging walls of the shoes are attached. It will be noted with respect to Figure 4, that one of the angle members 10, which is adjacent the shoe 14, is also attached to the rearward converging wall thereof while the plate 12 is attached to the forward converging wall with the scraper section, 5 superposed over said plate 12. The triangular plates 13 extend laterally beyond the plates 12 as shown more clearly in dotted lines in Figure 3. The upper end portions of the plates 13 carry studs 17 that extend through arcuate slots 18 in the plates 11.

The outermost ends of the plates 11 are attached to shoes 19 which may be similar to the 96 shoes 14 and the outer ends of the scraper blades 5* are also attached to these shoes. From the shoes 19 there extend exterior angle members 16 similar to the exterior angles 16 that connect the inner shoe members 14. These angle 100 members 16' are attached to the converging walls of the shoes 19 with the plates 11 attached over such angle members and the scraper portions 5- are attached over the plates 11. Beyond the shoes 19, the scraper sections 5 may of course also be attached to the angle members 16 for forming a firm support. In referring to Figure 5, it will be noted that the plates 11 and the exterior angle members 16* extend beyond the inner ends of the scraper sections 5. 1f desirable, one flange of each angle member 16 may be cut away where it extends beyond the inner end of the scraper sections 5. The projecting ends of the plates 11 and the angle members 16 are pivoted to the central section 5 of the scraper and the interior angle 15 by means of bolts 19*.

By referring to Figures 3 and 5, it will be noted that the interior angle member 15 that connects the two inner shoes 14 extends beyond the ends of said shoes. The exterior angles 16" that extend inwardly from the outer shoes 19 have their rear flanges cut away as shown at 16 in Figure 3. The inwardly extending portion of the forward flange is pivoted to the forward flange of the interior angle 15 by the pivots 19. As the scraper sections 5 are secured to the plates 11 and the exterior angle members 16 it will be obvious that the same will partake of the pivotal movement of the plates 11 and the exterior angles 16*. It will now be obvious that each plate 11 which is pivoted'upon a stud 19 at its lower end and has a swinging movement at its upper end upon the plate 13 will allow the end sections 5 of the scraper to freely rest upon the road and to readily rise and fall with the contour or crown of the road. According to this invention, the scraper will automatically adjust itself to the crown of the road whereby it becomes possible to scrape up the loose material no matter how quickly the crown of the road might vary.

In some instances, it may be desirable to gather material from a wider area than is possible with the machine disclosed in Figures 1 to 5. In such an event, the scraper and spiral feeder may be provided with an extension or attachment as shown in Fig. 6. In referring to this figure, it will be noted that the end collar or casting 20 on shaft 3, that supports the spiral 4, is provided with a flange 21 and that the shaft 3 is lengthened to extend beyond such collar. An auxiliary spiral 4 is mounted upon a collar or casting 22 mounted upon shaft 3 and provided with a flange 23 bolted to the flange 21. The outer end of the auxiliary spiral 4 is supported upon a casting or collar 24 mounted upon the end of the shaft. It will of course be understood that the castings 22 and 24 are provided with arms such as the arm 25 to which the spiral is attached and that such an auxiliary spiral may be attached upon each end.

According to this modification, the scraper 5 is adapted to be lengthened by extensions such as the extension 26 in Figure 6, which is similar to the main scraper and is attached thereto by suitable angle clips 27 so as to constitute the end of section 5".

The terminal attachments to the spiral and scraper will increase the width thereof for gathering material from a wider area, and such attachments may be used whenever the necessity arises.

I am aware that many changes may be made,

and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon otherwise than as necessitated by the prior art.

I claim as my invention:

1. In a machine of the class described, a scraper comprising a central section, upright members secured to said central section, vertical plates pivoted to said upright members for tilting movements, terminal scraper sections secured to said plates and bars pivotally connecting said upright members and said plates to said machine.

2. In a machine of the class described, a scraper comprising a central section and terminal sections, a support for the central section, a support for each terminal section including a vertical plate, means for pivotally connecting said terminal supports to said central support, and means for mounting the upper ends of said plates for swinging movement.

3. In a machine of the class described, a frame, a pair of spaced shoes, uprights attached to said shoes, parallel bars connecting each upright with said frame, a central scraper section attached to said shoes, a supporting plate secured to each upright, a wall plate pivoted to each supporting plate for vertical pivotal movement, a terminal shoe attached to each wall plate, means for pivotally connecting each terminal shoe withan intermediate shoe, and a terminal scraper section attached to each wall plate.

4. In a machine of the class described, a scraper comprising a central section and terminal sections, supporting means for the central section, parallel bars pivotally connecting said supporting means and frame, laterally extending plates on said supporting means, a vertical plate pivoted to each laterally extending plate and a terminal section secured to each vertical plate, said terminal sections rising and falling with the contour of the ground.

5. In a machine of the class described, a pair of spaced shoes, means for rigidly connecting said shoes, 9. central scraper section carried by said shoes, a pair of terminal shoes, means for pivotally connecting 'each terminal shoe with the adjacent shoe of said pair oi. shoes, a vertical plate secured to each terminal shoe, a terminal scraper section attached to each vertical plate and means for pivotally connecting said vertical plates to said pair of shoes.

6. In a machine of the class described, a frame, a central scraper section, means for pivotally connecting said central scraper section to said frame for free rising and falling movements, a pair of terminal scraper sections, means for pivotally connecting said terminal scraper sections to said central scraper sections for relative up and down movement, and means including a vertical wall plate for pivotally connecting each terminal scraper section with said-frame.

HARRY H. BaRBER. 

